Passive and Active Transport

Front

What is Passive Transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy. It occurs naturally and includes processes like diffusion and osmosis.

Front

What is Active Transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, usually in the form of ATP. It allows cells to move substances against their concentration gradient.

Front

Define Diffusion.

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until they reach equilibrium.

Front

What is Equilibrium in the context of diffusion?

Back

Equilibrium is the state reached when the concentration of molecules is equal on both sides of a membrane, resulting in no net movement of molecules.

Front

What is Osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a Selectively Permeable Membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is the difference between Active and Passive Transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

Give an example of Passive Transport.

Back

An example of passive transport is the movement of oxygen from the lungs into the bloodstream through diffusion.

Front

Give an example of Active Transport.

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What role does ATP play in Active Transport?

Back

ATP provides the energy required for active transport processes, enabling cells to move substances against their concentration gradients.